Cephalosporin derivatives and process for preparing the same

ABSTRACT

Novel cephalosporin derivatives having a higher antimicrobial activity across a broad antimicrobial spectrum. They are useful for treatment of infections caused by Gram-positive bacteria and Gram-negative bacteria. Such cephalosporin derivatives are prepared by a relatively simple method.

This is a division, of application Ser. No. 754,633 filed Dec. 27, 1976 now abandoned which is a C-I-P of Ser. No. 644,241 filed Dec. 24, 1975 now U.S. Pat. No. 4,172,197.

This invention relates to novel cephalosporin derivatives having an antimicrobial activity across a broad antimicrobial spectrum and salts thereof and a process for preparing the same.

It is known that cephalosporin derivatives are compounds having an antimicrobial activity. However, in order to obtain sufficient antimicrobial effects, it is necessary to use these known cephalosporin derivatives in large quantities.

It is therefore a primary object of this invention to provide cephalosporin derivatives having a higher antimicrobial activity.

Another object of this invention is to provide a process for preparing these cephalosporin derivatives having a higher antimicrobial activity.

As a result of our research works made with a view to developing novel cephalosporin derivatives having a higher antimicrobial activity across a broad antimicrobial spectrum, we have found that compounds represented by the following general formula (I) in which the sulfinyl group is of the R form, have a higher antimicrobial activity: ##STR1## wherein R₁ stands for (a) a heterocyclic group which is a mono or bicyclic ring residue containing in at least one ring 1 to 4 hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, the total number of atoms in any ring being 5 to 6, (b) a heterocyclic-lower alkyl group wherein the heterocyclic group is as defined above and the alkyl has 1 to 8 carbon atoms, (c) an aryl group which is a phenyl group, a substituted phenyl group having 1 to 3 substituents or a naphthyl group, or (d) an aralkyl group which is an aryl-lower alkyl group wherein the alkyl has 1 to 8 carbon atoms,

R₂ stands for a hydrogen atom or a lower alkyl group having 1 to 8 carbon atoms,

A stands for a hydrogen atom, a hydroxy group, a lower alkanoyloxy having 1 to 8 carbon atoms, a basic nitrogen containing group, a quaternary ammonium group, an N-substituted or N-unsubstituted carbamoyloxy group, an aroyloxy group, an aralkanoyloxy group, methoxy a mercapto group, a lower alkyl mercapto group having 1 to 8 carbon atoms, an aryl mercapto group wherein the aryl group is as defined above, a heterocyclic-mercapto group wherein the heterocyclic group is as defined above, or an azido group,

M stands for a hydrogen atom, an lower alkyl group having 1 to 8 carbon atoms, an aralkyl group which is as defined above, a trisubstituted silyl group, a group --CH₂ OCOR₃ in which R₃ is lower alkyl having 1 to 8 carbon atoms, aryl or aralkyl which aryl and aralkyl are as defined above, a phenacyl group, a pharmacologically acceptable non-toxic cation, an anionic charge or a monovalent carbon-oxygen bond when taken together with A, and n is 1,2 or 3,

wherein said R form is defined to indicate an optical isomer having stereochemically the same structure as that of an optical isomer having a positive specific rotation [α]_(D) in ethanol between the specific rotations of two sulfinyl group stereoisomers of a compound represented by the following general formula: ##STR2## wherein R₁, R₂ and n are as defined above.

The compound represented by the above general formula (II) is asymmetric in the sulfinyl group and includes two optical isomers. Accordingly, cephalosporins derived from this compound include two kinds of optical isomers in the sulfinyl group. It has been found that cephalosporins derived from an optical isomer having a positive specific rotation [α]_(D) in ethanol between the specific rotations of two isomers of the compound represented by the above general formula (II) and cephalosporins derived from a mixture containing an optical isomer of the compound of the above formula (II) having a positive specific rotation [α]_(D) in ethanol have a higher antimicrobial activity than corresponding cephalosporins derived from the other optical isomer of the compound of the above general formula (II) having a negative specific rotation [α]_(D) in ethanol.

Definitions of respective symbols in the above general formula (I) will now be described.

In the present invention, by the heterocyclic group is meant a heterocyclic group which is a mono or bicyclic ring residue containing in at least one ring 1 to 4 hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, the total number of atoms in any ring being 5 to 6. In the heterocyclic ring there may be 0 to 4 nitrogen atoms, 0 to 1 oxygen atom and 0 to 1 sulfur atom. As specific examples of the heterocyclic group, there can be mentioned a thienyl group, a furyl group, a pyridyl group, an imidazolyl group, an oxazolyl group, oxadiazolyl groups such as 1,2,3-oxadiazolyl, 1,2,4-oxadiazolyl, 1,2,5-oxadiazolyl and 1,3,4-oxadiazolyl groups, a thiazolyl group, thiadiazolyl groups such as 1,2,3-thiadiazolyl, 1,2,5-thiadiazolyl and 1,3,4-thiadiazolyl groups, tetrazolyl groups such as 1-H-tetrazolyl and 2-H-tetrazolyl groups, a benzothiazolyl group, an isoxazolyl group, a benzoxazinyl group, a benzothiazinyl group, a pyridazinyl group, and the like. These heterocyclic groups may be substituted or unsubstituted. In pyridyl and pyridazinyl groups, one of the nitrogen atoms may be in the form of an oxide. Further, in the pyridyl group, the nitrogen atom may be quaternized by a lower alkyl group.

As the substituent for the heterocyclic group, there can be mentioned a lower alkyl group having 1 to 8 carbon atoms, a lower alkenyl group having 1 to 8 carbon atoms, a phenyl group, a substituted phenyl group wherein the substituent is at least one member selected from the group consisting of halogen, hydroxy, cyano, carboxyl, lower alkyl having 1 to 8 carbon atoms, lower alkoxy having 1 to 8 carbon atoms, amino, lower alkylamino having 1 to 8 carbon atoms, di(1 to 8 carbon atom lower alkyl)amino and amino- 1 to 8 carbon atom lower alkyl, a naphthyl group, an aralkyl group which is phenalkyl having 1 to 8 carbon atoms in the alkyl, a halogen atom, a hydroxy group, an N-oxo group, a C-oxo group, a cyano group, a carboxyl group, a carboxymethyl group, a trifluoromethyl group, a 1 to 8 carbon atom lower alkylsulfonyl group, a nitro group, an amino group, a di(1 to 8 carbon atom lower alkyl)amino group, a 1 to 8 carbon atom lower alkoxy group, a 1 to 8 carbon atom lower alkylthio group, a 1 to 8 carbon atom alkoxymethyl group, a mono(1 to 8 carbon atom lower alkyl) amino group, a di(1 to 8 carbon atom lower alkyl) amino methyl group, a 1 to 8 carbon atom lower alkoxy methyl, a sulfonyl group, a mercapto group and a pyridyl group.

By the lower alkyl group is meant a linear or branched alkyl group having 1 to 8 carbon atoms. As specific examples, there can be mentioned methyl, ethyl, propyl, isopropyl, butyl isobutyl, t-butyl and amyl groups. The lower alkoxy and lower alkyl mercapto groups include corresponding alkoxy and alkylmercapto groups.

By the aryl group is meant a phenyl group, a substituted phenyl group having 1 to 3 substituents, preferably 1 substituent, or a naphthyl group. As the substituent, there can be mentioned, for example, a halogen atom, a hydroxy group, a cyano group, a carboxyl group, a lower alkyl group having 1 to 8 carbon atoms, a lower alkoxy group having 1 to 8 carbon atoms, an amino group, a lower alkylamino group having 1 to 8 carbon atoms, a di(1 to 8 carbon atom lower alkyl)amino group and an amino- 1 to 8 carbon atom lower alkyl group. As specific examples of the aryl group, there can be mentioned a phenyl group, o-, m- and p-chlorophenyl group, o-, m- and p-bromophenyl groups, a 3,4-dichlorophenyl group, a 3,5-dibromophenyl group, o-, m- and p-tolyl groups, a p-methoxyphenyl group, a 3,4,5-trimethoxyphenyl group, a p-hydroxyphenyl group, an o-carboxyphenyl group and a naphthyl group.

By the aralkyl group is meant a group consisting of a lower alkyl group such as mentioned above and an aryl group bonded to said lower alkyl group. As specific examples of the aralkyl group including an aryl group such as mentioned above, there can be mentioned a benzyl group, o-, m- and p-bromobenzyl groups, o-, m- and p-methoxybenzyl group, a phenethyl group, a p-chlorophenethyl group, a 3,5-diethylbenzyl group and a 3,4,5-trichlorobenzyl group.

Lower alkanoyloxy, aroyloxy and aralkanoyloxy groups indicate groups containing an acyl residue of an acid ester. More specifically, the lower alkanoyl moiety of the lower alkanoyloxy group is an acyl residue of a lower fatty acid containing a lower alkyl group such as mentioned above. As specific examples of the lower alkanoyloxy group, there can be mentioned an acetoxy group, a propionyloxy group and a butyryloxy group. The aroyloxy group includes similar groups derived from aryl groups such as mentioned above, and the aralkanoyloxy group includes similar groups consisting of an alkanoyloxy group such as mentioned above and bonded thereto, an aryl group such as mentioned above.

The basic nitrogen-containing group includes amine residues such as residues of alkylamines, e.g., methylamine, ethylamine, dimethylamine and triethylamine, and the quaternary ammonium group includes residues of N,N'-dibenzyl pyridinium, pyridinium, 1-quinolinium and 1-picolinium.

As the substituted or unsubstituted carbamoyloxy group, there can be mentioned, for example, carbamoyloxy, thiocarbamoyloxy, N-lower alkyl-carbamoyloxy, N-lower alkyl-thiocarbamoyloxy, N,N-di-(lower alkyl)-carbamoyloxy and N,N-di-(lower alkyl)-thiocarbamoyloxy groups.

Further, as pointed out hereinbefore, A and M may be bonded together to form a monovalent carbon-oxygen bond in the lactone ring.

As the non-toxic cation as M, there can be mentioned, for example, ions of metals such as aluminum, alkali metals, e.g., sodium and potassium, and alkaline earth metals, e.g., calcium and magnesium, and ions of amine salts, for example, generally known amine salts, such as salts of benzylamine, N,N-dibenzylethylene diamine, methylamine, triethylamine, procaine and N-ethylpiperidine.

By the trisubstituted silyl group is meant a silyl group having three substituents selected from lower alkyl groups, aryl groups and aralkyl groups such as mentioned above.

Specific examples of the portion ##STR3## in the intended compound of the present invention are as follows: ##STR4##

Specific examples of A in the above general formula (I) are as follows: ##STR5##

Especially preferred examples of the group R₁ include thienyl, pyridyl, thiadiazolyl, tetrazolyl, imidazolyl, triazolyl, pyrimidyl, isoxazolyl, phenyl, p-chlorophenyl, tolyl and p-methoxyphenyl groups which may be unsubstituted or substituted by lower alkyl or aryl groups. More preferred examples include 2-thienyl, 3-thienyl, 2-pyridyl, 4-pyridyl, 5-methyl-1,3,4-thiadiazol-2-yl, 1,3,4-thiadiazol-2-yl, 2-imidazolyl, 3-isoxazolyl, 1-methyl-1H-tetrazol-5-yl, 1,2,4-triazol-3-yl, 2-pyrimidyl and phenyl groups.

Especially preferred examples of A include a hydrogen atom, a hydroxyl group and lower alkanoyloxy, pyridinium, tetrazolylthio, thiazolylthio, triazolylthio, methoxy and methylthio groups. More preferred examples include a hydrogen atom and acetoxy, 1-methyl-1H-tetrazol-5-ylthio and 5-methyl-1,3,4-thiadiazol-2-ylthio groups.

Compounds of the above general formula (I) in which R₂ is a hydrogen atom and n is 1 have a highest antimicrobial activity.

Compounds of the present invention can be prepared by the following methods.

Method (A)

A compound represented by the following formula (III): ##STR6## wherein A and M are as defined above, or its reactive derivative is reacted with a compound of the R form represented by the above general formula (II) or its activated forms.

The carboxylic acid of the R form represented by the above general formula (II) is a carboxylic acid formed by bonding a group --COOH to the portion of the R form ##STR7## in the intended compound of the present invention. In other words, the carboxylic acid of the above formula (II) has a positive specific rotation [α]_(D) in ethanol.

As the reactive derivative of the compound of the formula (III), there can be mentioned a silyl ester and an amine salt.

As the activated forms of the carboxylic acid of the formula (II), there can be mentioned, for example, acid chlorides, acid anhydrides, amides, azides, active esters and salts formed with an alkali metal, an alkaline earth metal, ammonia or an organic base.

The reaction between the compound of the formula (II) and the compound of the formula (III) is carried out in a suitable solvent such as acetone, dioxane, tetrahydrofuran, acetonitrile, chloroform or methylene chloride, if desired in the presence of a base such as sodium bicarbonate or potassium bicarbonate, at room temperature or under cooling.

When the compound of the above formula (II) is reacted in the form of a free acid or salt, it is preferred that the reaction be carried out in the presence of an acid binder such as dicyclohexyl carbodiimide, diphenyl phosphoric azide, diethyl phosphoric cyanide, hexachlorotriphosphotriazine or triazine trichloride.

Method (B)

When a substituent A is a nucleophilic group, the intended compound is prepared by condensing 7-aminocephalosporanic acid with a carboxylic acid of the above formula (II) and substituting the acetoxy group of the resulting cephalosporin with a nucleophilic group.

Method (C)

A compound of the above formula (III) is acylated with a carboxylic acid of the above formula (II) or its activated form with the aid of an acylating enzyme, whereby a cephalosporin of the formula (I) is formed.

Method (D)

When the starting carboxylic acid of the R form represented by the above formula (II) contains an equal or minor amount of an isomer having in the sulfinyl group a stereostructure reverse to that of the R form (having a negative specific rotation [α]_(D) in ethanol), the resulting cephalosporin is subjected to chromatography, for example, reversed phase partition chromatography, or to recrystallization treatment, whereby the intended compound of the R form is recovered.

In general, the reaction temperature in the process of this invention is not critical but the reaction is preferably conducted under cooling, for example at about -20° C. to 0° or at room temperature. The reaction period also is not critical and it may be varied, for example, from several minutes to several hours, depending upon the kind and type of starting material and reaction solvent employed, the reaction temperature applied and other factors.

Compounds of the present invention represented by the above general formula (I) have a high antimicrobial activity to Gram-positive bacteria and Gram-negative bacteria in animals and men. Accordingly, they are effective for remedy of diseases infected by these bacteria, such as air-passage diseases, e.g., bronchitis, pneumonia and pleurisy, diseases of liver, gall and abdomen, e.g., cholecystitis and peritonitis, diseases of blood and cardiac vessels, e.g., septicemia, urinary passage diseases, e.g., pyelitis, nephritis and cystitis, and otorhinolaryngological diseases, e.g., tympanitis and parotitis.

The present invention, in a further aspect, is directed to pharmaceutical compositions incorporating a compound of the formula (I) hereof as an essential active component in admixture with a pharmaceutically acceptable non-toxic carrier.

The compounds of the present invention can be absorbed effectively in living bodies by oral administration or parenteral administration. In the latter case, the active compounds are in suitable solvents such as sterilized water, physiological saline solution, glucose solution and ordinary injection liquids and electrolytic solutions.

The amount to be administered, that is, the dosage of the active cephalosporin compound (I) should be determined by skilled physicians taking consideration of the ages and weight of patients, kinds and severities of disorders and other factors, but there is usually employed the total daily dosage for adults of about 250 to 1,000 mg., preferably in multiple doses such as three or more times a day, while larger total daily dosages may be effectively employed in some cases.

In a still further aspect, the present invention is directed to the compound 2-thienylsulfinylacetic acid and also the R form thereof. 2-Thienylsulfinylacetic acid is a new compound useful as an intermediate for the preparation of a cephalosporin of the present invention.

The present invention will now be described in detail by reference to the following Examples that by no means limit the scope of the present invention.

The starting carboxylic acids of the R form represented by the above formula (II) may preferably be prepared by the route illustrated by the following scheme wherein R₁, R₂ and n are as defined before: ##STR8##

In the following Examples, the starting carboxylic acids which are not specifically illustrated with respect to the preparation thereof, were prepared in the same manner as described in Referential Examples 1, 2 and 3 with respect to 2-thienylsulfinyl acetic acid.

REFERENTIAL EXAMPLE 1

11.6 g of 2-mercaptothiophene and 10.4 g of monochloroacetic acid were refluxed for 3 hours with 8.8 g of sodium hydroxide and 100 ml of water, and the pH of the reaction mixture was adjusted to 2.0 by addition of hydrochloric acid to precipitate an oily substance. The precipitate was extracted with ethyl acetate, dried with anhydrous sodium sulfate and concentrated to obtain 12.1 g of a light yellow crystal. Results of the NMR spectrum analysis (CDCl₃) of the product were as follows:

δ3.5 (singlet, 2H), δ6.9-7.4 (multiplet, 3H),

δ11.6 (singlet, 1H)

REFERENTIAL EXAMPLE 2

8.7 g of 2-thienylthioacetic acid was dissolved in 30 ml of acetic acid and 6.8 ml of 30% aqueous hydrogen peroxide was added under ice cooling and agitation. The mixture was agitated at room temperature for 5 hours. Acetic acid was removed from the reaction mixture under reduced pressure, and the residue was recrystallized from ethyl acetate to obtain 5.3 g of 2-thienylsulfinyl acetic acid having a melting point of 114° to 116° C. Results of the NMR spectrum analysis (DMSO-d₆) of this compound were as follows:

δ4.1 (singlet, 2H), δ7.15 (multiplet, 1H),

δ7.55 (triplet, 1H), δ7.9 (doublet, 1H) Elementary analysis values of the product as C₆ H₆ S₂ O₃ were as follows:

Calculated: C=37.88%, H=3.18%, S=33.71%; Found: C=37.76%, H=3.31%, S=33.48%.

REFERENTIAL EXAMPLE 3

1.00 g of 2-thienylsulfinylacetic acid and 2.57 g of brucine were dissolved in 25 ml of ethanol, and the solution was concentrated and dried to the solid. The residual powder was washed with 35 ml of hot benzene, and the insoluble solids were recrystallized from 20 ml of ethanol and 1.50 g of the obtained crystal was treated with hydrochloric acid and extracted with ethyl acetate. The organic layer was concentrated and crystallized from ethyl acetate to obtain 0.35 g of optically active 2-thienylsulfinylacetic acid. The specific rotation [α]_(D) ²²° of the so obtained compound in ethanol was +11.0° at C=1.0 (the concentration being 1.0% in ethanol).

EXAMPLE 1

0.38 g of 2-thienylsulfinylacetic acid ([α]_(D) ²²° : +11.0°, C=1.00, ethanol) obtained according to the method described in Referential Example 3 was dissolved in 8 ml of dry acetone, and 0.28 ml of triethylamine and 3 drops of N,N-dimethylbenzylamine were added to the solution. The mixture was agitated and cooled to -10° C., and 0.24 g of pivaloyl chloride was added thereto. Then, the mixture was agitated at -10° C. for 30 minutes, and a liquid mixture of 0.54 g of 7-aminocephalosporanic acid, 0.28 g of triethylamine, 3 ml of acetone and 3 ml of water was added at a stroke to the above mixture under violent agitation at the above temperature. Then, the mixture was agitated for 30 minutes at -10° C., for 1 hour at 0° C. and for another 1 hour at room temperature. The liquid reaction mixture was concentrated at a temperature lower than 40° C. and washed with ethyl acetate. The pH was adjusted to 3 by 2 N hydrochloric acid and the mixture was extracted with ethyl acetate. The organic layer was concentrated under reduced pressure and dried under reduced pressure to obtain 0.43 g of a crude crystal containing 7-(2-thienylsulfinylacetamido)cephalosporanic acid of the R form which was optically active in the sulfoxide. The crude crystal was subjected to column chromatography using Sephadex Lh-20 (manufactured by Pharmacia Fine Chemicals AB) and methanol as the solvent, and the pure product was fractionally recovered.

NMR Spectrum (DMSO-d₆), δ ppm: 2.0 (singlet, 3H), 3.6 (quadruplet, 2H), 4.1 (quadruplet, 2H), 4.8 (quadruplet, 2H), 5.1 (doublet, 1H), 5.7 (quadruplet, 1H), 5.1 (doublet, 1H), 5.7 (quadruplet, 1H), 7.2 (triplet, 1H), 7.6 (doublet, 1H), 8.0 (doublet, 1H), 9.2 (doublet, 1H).

Elementary Analysis Values as C₁₆ H₁₆ N₂ O₇ S₃.1/2H₂ O: Calculated: C=42.3%, H=3.78%, N=6.18%, S=21.21%; Found: C=42.52%, H=4.15%, N=5.78%, S=20.85%.

The minimum inhibitory concentrations (μg/ml) (MIC) of the so obtained compound to various Gram-positive bacteria and Gram-negative bacteria are shown in Table 1. For comparison, MIC data of a cephalosporin derivative formed from 2-thienylsulfinylacetic acid having [α]_(D) ²⁰° of -9.2° according to the method described in Comparative Example given hereinafter.

                  TABLE 1                                                          ______________________________________                                                          7-(2-Thienyl-                                                                              7-(2-Thienyl-                                                      sul-        sul-                                                               finylacetamido)                                                                            finylacetamido)                                                    cephalosporanic                                                                            cephalosporanic                                   Bacterium        acid        acid                                              ______________________________________                                         [α].sub.D.sup.22° in ethanol                                      of starting 2-   +11.0       -9.2                                              thienylsulfinyl-                                                               acetic acid                                                                    Staphylococcus aureus,                                                                          0.8         1.6                                               ATCC 6538 P                                                                    Staphylococcus aureus,                                                                          1.6         6.3                                               ATCC MS 27                                                                     Escherichia coli, NIHJ                                                                          1.6         6.3                                               Escherichia coli, W 3630                                                                        12.5        50                                                Salmonella enteritidis gaertner                                                                 1.6         12.5                                              Klebsiella pneumoniae,                                                                          0.8         6.3                                               ATCC 10031                                                                     Shigella sonnei E 33                                                                            3.1         25                                                Proteus rettgeri, ACR                                                                           100         100                                               Pseudomonas aeruginosa                                                                          100         100                                               ______________________________________                                    

Even when the above crude crystal was used, excellent inhibiting effects were similarly confirmed.

COMPARATIVE EXAMPLE

0.38 G of 2-thienylsulfinylacetic acid ([α]_(D) ²²° :-9.2°, C=1.00, ethanol) was dissolved in 8 ml of dry acetone, and 0.28 ml of triethylamine and 3 drops of N,N-dimethylbenzylamine were added to the solution and the mixture was agitated. The resulting solution was cooled to -10° C. and 0.24 g of pivaryl chloride was added thereto under agitation. The mixture was agitated at -10° C. for 30 minutes, and a liquid mixture of 0.54 g of 7-aminocephalosporanic acid, 0.28 g of triethylamine, 3 ml of acetone and 3 ml of water was added at a stroke under violent agitation at the above temperature. The reaction mixture was agitated at -10° C. for 30 minutes, at 0° C. for 1 hour and at room temperature for another 1 hour. The liquid reaction mixture was concentrated at a temperature lower than 40° C. and the residue was dissolved in a 3% aqueous solution of sodium hydrogencarbonate and washed with ethyl acetate. The pH was adjusted to 3 by 2 N hydrochloric acid, and extraction was conducted with ethyl acetate. The organic layer was concentrated and dried under reduced pressure to obtain 0.38 g of a crude crystal of 7-(2-thienylsulfinylacetamido)cephalosporanic acid which was optically active in the sulfoxide. The NMR spectrum of the product was substantially in agreement with that of the compound obtained in Example 1.

EXAMPLE 2

150 mg of a mixture of diastereomers of 7-(2-thienylsulfinylacetamido)cephalosporanic acid which was substantially optically inactive in the sulfoxide was separated by reverse phase chromatography using a non-polar coating resin as a carrier and water-methanol as a solvent. The main components of the thus separated two fractions were found to be in agreement with two kinds of 7-(2-thienylsulfinylacetamido)cephalosporanic acid derived from 2-thienylsulfinylacetic acid optically active in the sulfoxide. The specific rotation [α]_(D) ²⁵° of the fraction containing the compound of Example 1 in a major amount was +115.9° (C=0.80, chloroform).

EXAMPLE 3

300 mg of 7-(2-thienylsulfinylacetamido)cephalosporanic acid of the R form optically active in the sulfoxide, which was synthesized according to the method described in Example 1, 130 mg of sodium hydrogencarbonate and 140 mg of 2-mercapto-5-methyl-1,3,4-thiadiazole were heated and agitated at 60° C. for 5 hours in 6 ml of a phosphoric acid buffer solution having a pH of 6.5. Then, the pH of the reaction mixture was adjusted to 2.5 and the resulting precipitate was collected and dried to obtain 220 mg of a crude crystal of 7-(2-thienylsulfinylacetamido)-3-(5-methyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid optically active in the sulfoxide. The pure product was obtained by recrystallizing the crude crystal from water-acetone. The minimum inhibitory concentration (MIC) of the product was much superior to that of the product similarly derived from the compound obtained according to the method described in Comparative Example.

NMR Spectrum (DMSO-d₆), 8 δ ppm: 2.7 (singlet, 3H), 3.7 (quadruplet, 2H), 4.1 (quadruplet, 2H), 4.5 (quadruplet, 2H), 5.1 (doublet, 1H), 5.7 (quadruplet, 1H), 7.2 (triplet, 1H), 7.6 (doublet, 1H), 8.0 (doublet, 1H), 9.2 (doublet, 1H).

EXAMPLE 4

154 mg of t-butyl 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylate and 83 mg of dicyclohexylcarbodiimide were dissolved in 5 ml of benzene, and 76 mg of 2-thienylsulfinylacetic acid ([α]_(D) ²²° : +11.0°, C=1.00, ethanol) was added to the solution. This liquid reaction mixture was agitated at 25° C. for 2 hours. The mixture was filtered, made adsorbed on 2 g of silica gel and subjected to chromatography using benzene-ethyl acetate (50:50) on 20 g of silica gel to obtain 145 mg of t-butyl 7-(2-thienylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylate. The so obtained ester was dissolved in 1 ml of trifluoroacetic acid, and the solution was agitated at 25° C. for 5 minutes. Then, the solution was added dropwise to 70 ml of ether. The resulting precipitate was collected and dissolved in 5% aqueous sodium bicarbonate solution to form 100 ml of a solution. Then, the solution was extracted with ethyl acetate, and the pH of the aqueous layer was adjusted to 2.0 and the aqueous layer was further extracted with ethyl acetate. The organic layer was dried and concentrated until the volume was reduced to 5 ml. The resulting residue was mixed with a 30% solution of sodium 2-ethylhexanoate in propanol, and ether was added to the mixture. The precipitated salt was collected, recrystallized from methanol-ether and dried under reduced pressure to obtain 51 mg of sodium 7-(2-thienylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylate of the R form optically active in the sulfoxide. The NMR spectrum was found to be in agreement with that of the intended product. The bacterium-inhibiting activity of the so obtained compound was much superior to that of the product derived in the same manner by using 2-thienylsulfinylacetic acid having [α]_(D) ²²° of -9.2° as the starting compound.

EXAMPLE 5

7-Amino-3-heterocyclic-thiomethyl-3-cephem-4-carboxylic acids or t-butyl esters thereof were reacted with 2-thienylsulfinylacetic acid ([α]_(D) ²²° : +11.0°, C=1.00, ethanol) according to the method described in Example 1 or Example 4 to obtain the following corresponding 7-(2-thienylsulfinylacetamido)-3-heterocyclic-thiomethyl-3-cephem-4-carboxylic acids or sodium salts thereof, each being optically active in the sulfoxide and being excellent in the bacterium-inhibiting effect.

7-(2-Thienylsulfinylacetamido)-3-(2-pyridylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-pyridylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-oxo-4-pyridylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-pyrimidylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-oxo-4-pyrimidylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-oxo-5-methyl-4-pyrimidylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(3-pyridazinylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-oxo-3-pyridazinylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-oxo-3-pyridazinylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-thienylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-methyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-methyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-methyl-1,2,4-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-methyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1,5-dimethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1,3-dimethyl-1,2,4-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4,5-dimethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-ethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-ethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-ethyl-1,2,4-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-ethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1,5-diethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4,5-diethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1,3-diethyl-1,2,4-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-methoxymethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-methyl-5-trifluoromethyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-allyl-1,2,4-triazol-3-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(3-methyl-1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-methyl-1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(3,5-dimethyl-1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(3-ethyl-1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-ethyl-1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(3,5-diethyl-1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(3-methoxymethyl-1,2,3-triazol-4-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-ethyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1-methoxymethyl-1H-tetrazol-5-ylthiomethyl-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1,3,4-oxadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-methyl-1,3,4-oxadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2 -thienylsulfinylacetamido)-3-(1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-ethyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-trifluoromethyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(5-n-butyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(1,2,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid 7-(2-thienylsulfinylacetamido)-3-(3-methyl-1,2,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(3-ethyl-1,2,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(thiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-methylthiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(4-methylthiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2,4-dimethylthiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-ethylthiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2,4-diethylthiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(oxazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-methyloxazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-theinylsulfinylacetamido)-3-(4-methyloxazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2,4-dimethyloxazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2-ethyloxazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 7-(2-thienylsulfinylacetamido)-3-(2,4-diethyloxazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, and 7-(2-thienylsulfinylacetamido)-3-(2-pyrazinylthiomethyl)-3-cephem-4-carboxylic acid.

EXAMPLE 6

187 mg of a sodium salt of 7-(2-thienylsulfinylacetamido) cephalosporanic acid of the R form optically active in the sulfoxide, which was obtained according to the method described in Example 1, was dissolved in 1 ml of water, and 780 mg of potassium thiocyanate and 0.05 ml of pyridine were added to the solution. The mixture was heated at 65° to 70° C. for 6 hours, and was then cooled. The resulting solution was diluted with 10 ml of water, and the aqueous solution was passed through a column packed with 13 g of Amberlite XAD-2 (trademark), washed with water and developed with 95% ethanol. The eluate was concentrated to obtain 105 mg of 7-(2-thienylsulfinylacetamido)-3-(1-pyridiniummethyl)-3-cephem-4-carboxylate of the R form optically active in the sulfoxide. The product was excellent in the antimicrobial activity.

EXAMPLE 7

Procedures of Example 1 were repeated by using 7-amino-deacetoxycephalosporanic acid instead of 7-aminocephalosporanic acid to obtain 7-(2-thienylsulfinylacetamido)-3-methyl-3-cephem-4-carboxylic acid of the R form optically active in the sulfoxide. The microbial activity of this product was much superior to that of the product obtained in the same manner by using 2-thienylsulfinylacetic acid having a negative specific rotary power.

EXAMPLE 8

Procedures of Example 1 were repeated by using 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid instead of 7-aminocephalosporanic acid to obtain 7-(2-thienylsulfinylacetamide)-3-azidomethyl-3-cephem-4-carboxylic acid of the R form optically active in the sulfoxide.

EXAMPLE 9

Procedures of Example 1 were repeated by using 7-amino-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid instead of 7-aminocephalosporanic acid to obtain 7-(2-thienylsulfinylacetamido)-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid of the R form optically active in the sulfoxide.

EXAMPLE 10

0.52 g of 4-pyridylsulfinylacetic acid of the R form was dissolved in 20 ml of dry acetone, and 0.5 ml of triethylamine and 2 drops of N,N-dimethylbenzylamine were added to the solution. The solution was agitated and cooled to -20° C., and 0.36 ml of pivaloyl chloride was added dropwise to the solution under agitation. After completion of the dropwise addition, the mixture was agitated at -20° C. for 30 minutes, and at this temperature a mixture of 0.81 g of 7-aminocephalosporanic acid, 0.5 ml of triethylamine and 10 ml of methanol was added at a stroke under violent agitation. Then, the reaction mixture was agitated at -20° C. for 30 minutes, at 0° C. for 1 hour and at room temperature for 2 hours. The reaction mixture was concentrated, and the residue was dissolved in water. The solution was washed with ethyl acetate and with chloroform, and the pH was adjusted to 2.0. The resulting precipitate was removed by filtration, and the filtrate was extracted with chloroform and with ethyl acetate. The ethyl acetate layer was treated with active carbon, dried and concentrated under reduced pressure to obtain 0.27 g of 7-(4pyridylsulfinylacetamido)cephalosporanic acid of the R form, the IR and NMR spectra of which were found to be in agreement with those of the intended product. The MIC data of the so obtained compound are shown in Table 2.

                  TABLE 2                                                          ______________________________________                                                            MIC(μg/ml) of 7-(4-Pyridyl-                                                 sulfinylacetamido) cephalo-                                 Bacterium          sporani Acid (R form)                                       ______________________________________                                         Staphylococcus aureus, ATCC 6538 P                                                                0.4                                                         Staphylococcus aureus, MS 27                                                                      1.6                                                         Escherichia coli, NIHJ                                                                            0.8                                                         Escherichia coli, W 3630                                                                          12.5                                                        Salmonella enteritidis gaertner                                                                   3.2                                                         Klebsiella pneumoniae, ATCC 10031                                                                 0.8                                                         Shigella sonnei E 33                                                                              6.3                                                         Proteus vulgaris, OX 19                                                                           1.6                                                         Proteus rettgeri, ACR                                                                             100                                                         ______________________________________                                    

EXAMPLE 11

0.52 g of 4-pyridylsulfinylacetic acid of the R form was dissolved in a liquid mixture of 13 ml of dry dimethylsulfoxide and 7 ml of dry acetone, and 0.5 ml of triethylamine and 2 drops of N,N-dimethylbenzylamine were added to the solution. The solution was agitated and cooled to -5° C., and 0.36 ml of pivaloyl chloride was added to the solution under agitation. After completion of the dropwise addition, the mixture was agitated at -5° C. for 20 minutes and at this temperature liquid mixture of 0.64 g of 7-aminodeacetoxycephalosporanic acid, 0.5 ml of triethylamine and 10 ml of methanol was added at a stroke to the above mixture under violent agitation. The reaction mixture was agitated at -5° C. for 30 minutes, at 0° C. for 1 hour and at room temperature for 2 hours. The liquid reaction mixture was concentrated at a temperature lower than 40° C. to distil the reaction solvent, and the residue was dissolved in water. Post treatments were carried out in the same manner as described in Example 10 to obtain 0.12 g of 7-(4-pyridylsulfinylacetamido)-deacetoxycephalosporanic acid of the R form the IR and NMR spectra of which were found to be in agreement with those of the intended product.

EXAMPLE 12

0.57 g of 2-thienylsulfinylacetic acid which was completely of the R form formed by further purifying the 2-thienylsulfinylacetic acid obtained in Referential Example 3 was dissolved in 20 ml of dry acetone, and 0.5 ml of triethylamine and 2 drops of N,N-dimethylbenzylamine were added to the solution. The solution was agitated and cooled to -20° C. Then, 0.36 ml of pivaloyl chloride was added dropwise to the solution under agitation, and the mixture was agitated at -20° C. for 30 minutes. At this temperature, a liquid mixture of 0.81 g of 7-aminocephalosporanic acid, 0.5 ml of triethylamine and 10 ml of methanol was added at a stroke to the above mixture under violent agitation. The reaction mixture was agitated at -20° C. for 30 minutes, at 0° C. for 1 hour and at room temperature for 2 hours. In the same manner as described in Example 1, the reaction mixture was post-treated to obtain 0.31 g of 7-(2-thienylsulfinylacetamido)cephalosporanic acid of the R form, the IR and NMR spectra of which were found to be in agreement with the intended product.

EXAMPLE 13

Procedures of Example 10 were repeated by using 3-thienylsulfinylacetic acid of the R form instead of the 2-pyridylsulfinylacetic acid, and the resulting reaction mixture was post-treated in the same manner as in Example 1 to obtain 7-(3-thienylsulfinylacetamido)-cephalosporanic acid of the R form.

EXAMPLE 14

Procedures of Example 10 were repeated by using 5-methyl-1,3,4-thiadiazol-2-ylsulfinylacetic acid of the R form instead of the 2-pyridylsulfinylacid, and the reaction mixture was post-treated in the same manner as in Example 1 to obtain 7-(5-methyl-1,3,4-thiadiazol-2-ylsulfinylacetamido)cephalosporanic acid of the R form.

EXAMPLE 15

Procedures of Example 11 were repeated by using 1-methyl-1H-tetrazol-5-ylsulfinylacetic acid of the R form instead of the 4-pyridylsulfinylacetic acid to obtain 7-(1-methyl-1H-tetrazol-5-ylsulfinylacetamido)deacetoxycephalosporanic acid of the R form.

EXAMPLE 16

0.46 g of a sodium salt of 7-(2-pyridylsulfinylacetamido)cephalosporanic acid of the R form obtained according to the method described in Example 10 was dissolved in 1 ml of water, and 1.97 g of potassium thiocyanate, 0.5 ml of water and 0.11 ml of pyridine were added to the solution. The mixture was heated at 65° to 70° C. for 6 hours, and then, it was cooled. The resulting solution was diluted with 20 ml of water, and the solution was passed through a column packed with 40 g of Amberlite XAD-2 (trademark), washed with water and developed with 95% ethanol. The eluate was collected and concentrated to obtain 0127 g of 7-(2-pyridylsulfinylacetamido)-3-(1-pyridiniummethyl)-3-cephem-4-carboxylate of the R form, the IR and NMR spectra of which were found to be in agreement with those of the intended product.

EXAMPLE 17

Procedures of Example 10 were repeated by using 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid instead of the 7-aminocephalosporanic acid to obtain 7-(2-pyridylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form.

EXAMPLE 18

Procedures of Example 10 were repeated by using a 3-4-lactone of 7-amino-3-hydroxymethyl-3-cephem-4-carboxylic acid instead of the 7-aminocephalosporanic acid to obtain a 3-4-lactone of 7-(2-pyridylsulfinylacetamido)-3-hydroxymethyl-3-cephem-4-carboxylic acid of the R form.

EXAMPLE 19

0.34 g of phenylsulfinylacetic acid of the R form ([α]_(D) ²⁰ : +183°, C=1.00, ethanol) was dissolved in 8 ml of dry acetone, and 0.28 ml of triethylamine and 1 drop of N,N-dimethylbenzylamine were added to the solution. The solution was agitated and cooled to -20° C., and 0.24 g of pivaloyl chloride was added to the solution under agitation. The solution was agitated at -20° C. for 30 minutes and at this temperature, a liquid mixture of 0.54 g of 7-aminocephalosporanic acid, 0.28 ml of triethylamine and 4 ml of methanol was added at a stroke to the above solution under violent agitation. Then, the mixture was agitated at -20° C. for 30 minutes, at 0° C. for 1 hour and at room temperature for 2 hours. Then, the solvent was distilled under reduced pressure and the residue was dissolved in water. The solution was washed with ethyl acetate, and the pH of the aqueous layer was adjusted to 2.5 by 2N hydrochloric acid and the aqueous layer was extracted with a small quantity of chloroform and then with ethyl acetate. The ethyl acetate layer was dried and concentrated under reduced pressure to obtain 0.18 g of 7-(phenylsulfinylacetamido)cephalosporanic acid of the R form, the IR and NMR spectra of which were found to be in agreement with these of the intended product.

The minimum inhibitory concentrations (MIC) of the so obtained compound to various Gram-positive bacteria and Gram-negative bacteria are shown in Table 3. For comparison, MIC data of the comparative product synthesized similarly by using phenylsulfinylacetic acid having a specific rotation [α]_(D) ²⁰ of -182° are also shown in Table 3. The specific rotation [α]_(D) ²⁰ was measured in ethanol at a concentration of 1.00%.

                  TABLE 3                                                          ______________________________________                                                          7-          7-                                                                 (Phenylsulfinyl-                                                                           (Phenylsulfinyl-                                                   ace-        ace-                                                               tamido)cephalo-                                                                            tamido)cephalo-                                   Bacterium        sporanic acid                                                                              sporanic acid                                     ______________________________________                                         [α].sub.D.sup.20 of starting                                             phenylsulfinyl-  +183°                                                                               -182°                                      acetic acid                                                                    Staphylococcus aureus,                                                                          0.2         25                                                6538 P                                                                         Staphylococcus aureus,                                                                          0.8         50                                                MS 27                                                                          Escherichia coli, NIHJ                                                                          1.6         100                                               Escherichia coli,                                                                               12.5        100                                               W 3630                                                                         Escherichia coli, PS 3                                                                          6.3         100                                               Escherichia coli,                                                                               12.5        100                                               RGN 14                                                                         Escherichia coli,                                                                               12.5        100                                               RGN 238                                                                        Salmonella enteritidis gaertner                                                                 3.2         50                                                Enterobacter     100         100                                               0655                                                                           Shigella sonnei  6.3         100                                               E 33                                                                           Proteus vulgaris,                                                                               1.6         100                                               OX 19                                                                          Proteus rettgeri, ACR                                                                           100         100                                               Pseudomonas aeruginosa,                                                                         100         100                                               IAM 1095                                                                       Klebsiella pneumoniae,                                                                          1.6         50                                                ATCC 10031                                                                     ______________________________________                                    

EXAMPLE 20

0.37 g of phenylsulfinylacetic acid of the R form containing minute amounts of impurities ([α]_(D) ²⁰ : +134, C=1.00, ethanol) was dissolved in 8 ml of dry acetone, and 0.28 ml of triethylamine and 1 drop of N,N-dimethylbenzylamine were added to the solution. The solution was agitated and cooled to -20° C. Then, 0.24 g of isovaleryl chloride was added to the solution under agitation, and the solution was added at -20° C. for 30 minutes. Then, a liquid mixture of 0.43 g of 7-aminodeacetoxycephalosporanic acid, 0.28 ml of triethylamine and 4 ml of methanol was added at a stroke to the above solution at the above temperature under violent agitation. Then, the mixture was agitated at -20° C. for 30 minutes, at 0° C. for 1 hour and at room temperature for 2 hours to effect reaction. The reaction mixture was post-treated in the same manner as described in Example 19 to obtain 0.21 g of 7-(phenylsulfinylacetamide) deacetoxycephalosporanic acid of the R form, the IR and NMR spectra of which were found to be in agreement with those of the intended product.

EXAMPLE 21

To 8 ml of methylene chloride were added 0.37 g of phenylsulfinylacetic acid of the R form ([α]_(D) ²⁰ : +183°, C=1.00, ethanol) and 0.41 g of dicyclohexylcarbodiimide, and the mixture was agitated at room temperature for 1.5 hours. Then, a solution consisting of 0.69 g of 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 0.28 ml of triethylamine and 8 ml of methylene chloride was added to the above mixture, and the resulting mixture was agitated at room temperature overnight. The reaction mixture was filtered, and the filtrate was post-treated in the same manner as described in Example 19 to obtain 0.17 g of 7-(phenylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form, the IR and NMR spectra of which were found to be in agreement with those of the intended product.

EXAMPLE 22

184 mg of a sodium salt of 7-(phenylsulfinylacetamido) cephalosporanic acid of the R form obtained in the same manner as described in Example 20 by using phenylsulfinylacetic acid of the R form having a specific rotation [α]_(D) ²⁹ of +134° (C=1.00, ethanol), was dissolved in 1 ml of water, and 780 mg of potassium thiocyanate and 0.05 ml of pyridine were added to the solution. Then, the mixture was heated at 65° to 70° C. for 6 hours and then cooled. The resulting solution was diluted with 10 ml of water, passed through a column packed with 13 g of Amberlite XAD-2 (trademark), washed with water and developed with 95% ethanol. The eluate was concentrated to obtain 110 mg of 7-(phenylsulfinylacetamido)-3-(1-pyridiniummethyl)-3-cephem-4-carboxylate of the R form, the IR and NMR spectra of which were found to be in agreement with those of the intended product.

EXAMPLE 23

Procedures of Example 19 were repeated by using 7-amino-3-(tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid instead of the 7-aminocephalosporanic acid to obtain 7-(phenylsulfinylacetamido)-3-(tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form.

EXAMPLE 24

Procedures of Example 19 were repeated by using a 3-4-lactone of 7-amino-3-hydroxymethyl-3-cephem-4-carboxylic acid instead of the 7-aminocephalosporanic acid to obtain a 3-4-lactone of 7-(phenylsulfinylacetamido)-3-hydroxymethyl-3-cephem-4-carboxylic acid of the R form.

EXAMPLE 25

100 mg of the pure product of 7-(2-thienylsulfinylacetamido)-3-(5-methyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid obtained according to the method as described in Example 3, were mixed with an equimolar amount (in terms of potassium 2-ethylhexanoate) of a 30% isopropanol solution of potassium 2-ethylhexanoate, followed by addition of ether.

The precipitated salt was collected, recrystallized from methanol-ether and dried under reduced pressure to obtain 85 mg of potassium 7-(2-thienylsulfinylacetamido)-3-(5-methyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylate of the R form optically active in the sulfoxide. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 26

145 mg of t-butyl 7-(2-thienylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylate obtained according to the method as described in Example 4 were dissolved in 1 ml of trifluoroacetic acid, and the solution was agitated at 25° C. for 5 minutes. The resulting precipitate was collected and dissolved in a 5% aqueous sodium bicarbonate solution to form 100 ml of a solution. Then the solution was extracted with ethyl acetate, and the pH of the aqueous layer was adjusted to 2.0 and the aqueous layer was further extracted with ethyl acetate. The organic layer was dried and then concentrated to dryness. The concentrated residue was suspended in 50 ml of water, and 100 mg of N,N'-dibenzyl ethylenediamine were added to the suspension. The mixture was stirred at room temperature, followed by filtration. The filtrate was freeze-dried to obtain 160 mg of N,N'-dibenzyl ethylenediamine salt of 7-(2-thienylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 27

154 mg of t-butyl 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylate and 83 mg of dicyclohexylcarbodiimide were dissolved in 5 ml of benzene, and 76 mg of 2-thienylsulfinylacetic acid ([α]_(D) ²²° : +30.0, C=1.00, ethanol) was added to the solution. This liquid reaction mixture was agitated at 25° C. for 2 hours. The mixture was filtered, made adsorbed on 2 g of silica gel and subjected to chromatography using benzene-ethyl acetate (50:50) on 20 g of silica gel to obtain 145 mg of white, foam-like t-butyl 7-(2-thienylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-caboxylate. The so obtained ester was dissolved in 1 ml of trifluoroacetic acid, and the solution was agitated at 25° C. for 5 minutes. Then, the solution was added dropwise to 70 ml of ether. The resulting precipitate was collected and dissolved in 5% aqueous sodium bicarbonate solution to form 100 ml of a solution. Then, the solution was extracted with ethyl acetate, and the pH of the aqueous layer was adjusted at 2.0 and the aqueous layer was further extracted with ethyl acetate. The organic layer was dried and concentrated until the volume was reduced to 5 ml. The resulting residue was mixed with a 30% solution of sodium 2-ethylhexanoate in propanol, and ether was added to the mixture. The precipitated salt was collected, recrystallized from methanol-ether and dried under reduced pressure to obtain 60 mg of sodium 7-(2-thienylsulfinylacetamido)3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylate of the R form which was optically active in the sulfoxide [melting point (decomposed) 138°-154° C., [α]_(D) ²⁵° : +37.9° (C=1.00, dimethylsulfoxide)]. The NMR spectrum was found to be in agreement with that of the intended product. The bacterium-inhibiting activity of the so obtained compound was much superior to that of the product derived in the same manner by using 2-thienylsulfinyl acetic acid having [α]_(D) ²²° of -9.2° as the starting compound.

EXAMPLE 28

408 mg. of 2-(2-thienylsulfinyl)propionic acid of the R form were dissolved in 12 ml. of dry methylene chloride and 0.3 ml. of triethylamine and 2 drops of N,N-dimethylbenzylamine were added to the solution. The mixture was agitated and cooled to -10° C., and 0.2 g. of pivaloyl chloride was added thereto. Then the mixture was agitated at -10° C. for 2 hours, and a liquid mixture of 656 mg. of 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid, 20 ml. of dry methylene chloride and 400 mg. of bis-trimethylsilylacetamide blended and stirred at room temperature for 1 hour, was added to the above mixture, and agitated for 30 minutes at -10° C., for 30 minutes at 0° C. and for another 1 hour at room temperature. After completion of the reaction the solvent was distilled off under reduced pressure and the residue was dissolved in 3% aqueous sodium bicarbonate solution. Then the solution was extracted with ethyl acetate 3 times, and the pH of the aqueous layer was adjusted to 3.0 by 2 N hydrochloric acid. The aqueous layer was allowed to stand in a cooling place until precipitate was formed. The precipitate was collected, dried and recrystallized from water-methanol to obtain 7-[2-(2-thienylsulfinyl)propionamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. The filtrate separated from the precipitate was extracted with ethyl acetate. The organic layer was dried by magnesium sulfate and concentrated, and the resulting residue was dissolved in methanol. The solution was subjected to column chromatography using Sephadex LH-20(manufactured and sold by Pharmacia Fine Chemicals AB, Sweden) and the product was fractionally recovered and concentrated. The resulting powder was the same as the above crystal obtained by recrystallization from water-methanol. The total amount of the obtained product was 440 mg.

Elementary Analysis Values as C₁₇ H₁₈ N₆ O₅ S₄ : Calculated: C=39.67%, H=3.52%, N=16.33%, S=24.92%; Found: C=39.2%, H=3.9%, N=16.7%, S=23.9%.

The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 29

548 g of 2-(2-thienylsulfinyl)octanoic acid were reacted in the same manner as described in Example 28 with 657 mg. of 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid to obtain 234 mg. of 7-[2-(2-thienylsulfinyl)octanamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid.

Elementary Analysis Values as C₂₂ H₂₈ N₆ O₅ S₄ : Calculated: C=45.19%, H=4.83%, N=14.37%, S=21.93%; Found: C=45.5%, H=4.9%, N=14.0%, S=22.2%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 30

198 mg. of 7-[2-(2-pyridylsulfinylheptanamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were prepared in the same manner as described in Example 28 by using 512 mg. of 2-(2-pyridylsulfinyl)heptanoic acid instead of 2-(2-thienylsulfinyl)propionic acid.

Elementary Analysis Values as C₂₂ H₂₈ N₇ O₅ S₃ : Calculated: C=46.62%, H=4.98%, N=17.30%, S=16.98%; Found: C=47.1%, H=5.2%, N=16.9%, S=16.6%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 31

576 mg. of 2-(2-thienylsulfinyl)nonanoic acid were reacted with 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid to obtain 418 mg. of 7-[2-(2-thienylsulfinyl)nonanamido-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid according to the method of Example 28.

Elementary Analysis Values as C₂₄ H₃₀ N₄ O₅ S₅ : Calculated: C=46.88%, H=4.92%, N=9.11%, S=26.07%; Found: C46.5%, H=5.4%, N=8.9%, S=25.7%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 32

391 mg of 7-[3-methyl-2-(2-thienylsulfinylbutyramido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were prepared in the same manner as described in Example 28 by using 464 mg. of 3-methyl-2-(2-thienylsulfinyl)butyric acid instead of 2-(2-thienylsulfinyl)-propionic acid.

Elementary Analysis Values as C₁₉ H₂₂ N₆ O₅ S₄ : Calculated: C=42.05%, H=4.09%, N=15.49%, S=23.63%; Found: C=41.7%, H=5.1%, N=14.9%, S=23.5%. The NMR spectrum was found to be in agreement with that of the indended product.

EXAMPLE 33

408 mg. of 3-(2-thienylsulfinyl)propionic acid and 7-amino-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 85 mg. of 7-[3-(2-thienylsulfinyl)propionamido]-3-(1H, 1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₇ H₁₇ N₅ O₅ S₄ : Calculated: C=40.87%, H=3.43%, N=14.02%, S=25.67%; Found: C=41.4%, H=3.6%, N=13.9%, S=25.5%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 34

436 mg. of 3-(2-thienylsulfinyl)butyric acid and 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 292 mg. of 7-[3-(2-thienylsulfinyl)butyramido]-3-azidomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₆ H₁₇ N₅ O₅ S₃ : Calculated: C=42.19%, H=3.76%, N=15.37%, S=21.12%; Found: C=42.5%, H=4.0%, N=14.9%, S=21.1%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 35

398 mg of 3-(2-pyridylsulfinyl)propionic acid and 7-amino-3-methoxymethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 93 mg. of 7-[3-(2-pyridylsulfinyl)propionamido]-3-methoxymethyl-3-cephen-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₇ H₁₉ N₃ O₆ S₂ : Calculated: C=46.04%, H=4.32%, N=9.48%, S=14.46%; Found: C=45.5%, H=5.3%, N=8.8%, S=15.0%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 36

426 mg. of 4-(2-pyridylsulfinyl)butyric acid and 7-amino-3-ethylthiomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 366 mg. of 7-[4-(2-pyridylsulfinyl)butyramido]-3-ethylthiomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₉ H₂₃ N₃ O₅ S₃ : Calculated: C=38.37%, H=4.94%, N=8.95%, S=20.48%; Found: C=38.0%, H=5.5%, N=8.4%, S=19.8%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 37

408 mg. of 3-(1-methyl-1H-tetrazol-5-ylsulfinyl)propionic acid and 7-amino-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 120 mg. of 7-[3-(1-methyl-1H-tetrazol-5-ylsulfinyl)propionamido]-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₅ H₁₇ N₉ O₅ S₃.H₂ O: Calculated: C=34.81%, H=3.7%, N=24.36%, S=18.95%; Found: C=35.4%, H=4.2%, N=24.1%, S=17.9%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 38

398 mg. of 3-(4-pyridylsulfinyl)propionic acid and 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 143 mg. of 7-[3-(4-pyridylsulfinyl)propinamido]-3-azidomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₆ H₁₆ N₆ O₅ S₂.1/2H₂ O: Calculated: C=43.14%, H=3.85%, N=18.87%, S=14.40%; Found: C=43.8%, H=4.2%, N=18.7%, S=15.8%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 39

468 mg. of 3-(2-methyl-1,3,4-thiadiazol-5-ylsulfinyl)butyric acid and 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 163 mg. of 7-[3-(2-methyl-1,3,4-thiadiazol-5-ylsulfinyl)butyramido]-3-azidomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₅ H₁₇ N₇ O₅ S₃.1/2H₂ O: Calculated: C=37.49%, H=3.78%, N=20.40%, S=20.02%; Found: C=37.1%, H=4.2%, N=19.8%, S=19.9%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 40

436 mg. of 3-(3-thienylsulfinyl)butyric acid and 7-amino-3-(1-oxopyridazine-3-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 432 mg. of 7-[3-(3-thienylsulfinyl)butyramido]-3-(1-oxopyridazine-3-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₀ H₂₀ N₄ O₆ S₄ : Calculated: C=44.43%, H=3.73%, N=10.36%, S=23.72%; Found: C=44.9%, H=4.2%, N=9.9%, S=22.3%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 41

626 mg. of [2-N-(t-butoxycarbonyl)aminomethylphenylsulfinyl] acetic acid instead of 2-(2-thienylsulfinyl)propionic acid were reacted in the same manner as described in Example 28 and 90 mg. of 7-[2-(2-aminomethylphenylsulfinyl)acetamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained by removing a protective group for nitrogen according to a conventional method.

Elementary Analysis Values as C₁₉ H₂₁ N₇ O₅ S₃.2H₂ O: Calculated: C=40.78%, H=4.50%, N=17.52%, S=17.19%; Found: C=42.0%, H=4.5%, N=16.9%, S=16.5%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 42

275 mg. of 7-(p-hydroxyphenylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were prepared in the same manner as described in Example 28 by using 400 mg. of p-hydroxyphenylsulfinylacetic acid instead of 2-(2-thienylsulfinyl)propionic acid.

Elementary Analysis Values as C₁₈ H₁₈ N₆ O₆ S₃ : Calculated: C=42.34%, H=3.55%, N=16.46%, S=18.84%; Found: C=42.1%, H=3.8%, N=16.1%, S=18.4%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 43

380 mg. of 3-thienylsulfinylacetic acid of the R form and 7-amino-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 369 mg. of 7-(3-thienylsulfinylacetamido)-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form were obtained.

Elementary Analysis Values as C₁₆ H₁₅ N₅ O₅ S₄ : Calculated: C=39.58%, H=3.11%, N=14.42%, S=26.41%; Found: C=39.3%, H=3.5%, N=13.8%, S=25.5%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 44

380 mg. of 3-thienylsulfinylacetic acid of the R form and 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 410 mg. of 7-(3-thienylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylic acid of the R form were obtained.

Elementary Analysis Values as C₁₄ H₁₃ N₅ O₅ S₃ : Calculated: C=39.34%, H=3.07%, N=16.38%, S=11.25%; Found: C=39.2%, H=3.2%, N=16.1%, S=10.9%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 45

380 mg. of 3-thienylsulfinylacetic acid of the R form and 7-amino-3ethylthiomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 116 mg. of 7-(3-thienylsulfinylacetamido)-3-ethylthiomethyl-3-cephem-4-carboxylic acid of the R form were obtained.

Elementary Analysis Values as C₁₆ H₁₈ N₂ O₅ S₄ : Calculated: C=43.03%, H=4.06%, N=6.27%, S=28.72%; Found: C=42.7%, H=4.3%, N=5.8%, S=27.7%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 46

348 mg. of 2-furylsulfinylacetic acid of the R form and 7-amino-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 109 mg. of 7-(2-furylsulfinylacetamido)-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form were obtained.

Elementary Analysis Values as C₁₆ H₁₅ N₅ O₆ S₃.H₂ O: Calculated: C=42.19%, H=3.76%, N=15.38%, S=21.12%; Found: C=41.8%, H=4.1%, N=14.7%, S=20.0%

The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 47

348 mg. of 2-furylsulfinylacetic acid of the R form and 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 163 mg. of 7-(2-furylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylic acid of the R form were obtained.

Elementary Analysis Values as C₁₄ H₁₃ N₅ O₆ S₂.H₂ O: Calculated: C=39.16%, H=3.52%, N=16.31%, S=14.93%; Found: C=38.8%, H=4.0%, N=16.1%, S=14.5%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 48

370 mg. of 2-pyridylsulfinylacetic acid and 7-amino-3-(1-oxopyridazine-3-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 341 mg. of 7-(2-pyridylsulfinylacetamido)-3-(1-oxopyridazine-3-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₉ H₁₇ N₅ O₆ S₃ : Calculated: C=44.18%, H=3.32%, N=13.56%, S=18.62%; Found: C=44.4%, H=3.7%, N=12.9%, S=18.1%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 49

370 mg. of 4:pyridylsulfinylacetic acid and 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 76 mg. of 7-(4-pyridylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₅ H₁₄ N₆ O₅ S₂ : Calculated: C=42.65%, H=3.34%, N=19.89%, S=15.18%; Found: C=40.9%, H=3.9%, N=20.1%, S=14.8%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 50

412 mg. of 2-methyl-1,3,4-thiadiazol-5-ylsulfinylacetic acid and 7-amino-3-azidomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 124 mg. of 7-(2-methyl-1,3,4-thiadiazol-5-ylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₃ H₁₃ N₇ O₅ S₃ : Calculated: C=35.21%, H=2.95%, N=22.11%, S=21.69%; Found: C=34.7%, H=3.3%, N=21.7%, S=20.8%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 51

380 mg. of 1-methyl-1H-tetrazol-5-ylsulfinylacetic acid and 7-amino-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 148 mg. of 7-(1-methyl-1H-tetrazol-5-ylsulfinylacetamido)-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₄ H₁₇ N₉ O₅ S₃.1/2H₂ O: Calculated: C=34.00%, H=3.26%, N=25.49%, S=19.45%; Found: C=33.7%, H=3.5%, N=24.9%, S=18.6%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 52

380 mg. of 2-thienylsulfinylacetic acid of the R form obtained in Referential Example 3 and 7-amino-3-(1-carboxymethyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 359 mg. of 7-(2-thienylsulfinylacetamido)-3-(1-carboxymethyl-1H-tetrazol-5ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₇ H₁₆ N₆ O₇ S₄ : Calculated: C=37.49%, H=2.96%, N=15.43%, S=23.55%; Found: C=37.1%, H=3.3%, N=14.9%, S=23.2%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 53

446 mg. of 2-thioxo-2H-thiazoline-4-ylsulfinylacetic acid of the R form and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 152 mg. of 7-(2-thioxo-2H-thiazoline-4-ylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₆ H₁₅ N₅ O₅ S₆.1/2H₂ O: Calculated: C=39.33%, H=3.30%, N=14.33%, S=39.37%; Found: C=39.0%, H=3.7%, N=14.0%, S=38.8%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 54

414 mg. of 2-oxo-2H-thiazoline-4-ylsulfinylacetic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 238 mg. of 7-(2-oxo-2H-thiazoline-4-ylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₆ H₁₅ N₅ O₆ S₅.1/2H₂ O: Calculated: C=35.41%, H=2.97%, N=12.91%, S=29.54%; Found: C=35.2%, H=3.2%, N=12.1%, S=28.9%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 55

438 mg. of 2-(2-nitrofuran-5-ylsulfinyl)acetic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 382 mg. of 7-[2-(2-nitrofuran-5-ylsulfinyl)acetamido]-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₇ H₁₅ N₅ O₈ S₄ : Calculated: C=37.43%, H=2.77%, N=12.84%, S=23.51%; Found: C=37.4%, H=2.9%, N=12.4%, S=22.7%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 56

412 mg. of 2-(2-methyl-1,3,4-thiadiazol-5-ylsulfinylacetic acid and 7-amino-3-phenylthiomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 193 mg. of 7-[2-(2-methyl-1,3,4-thiadiazol-5ylsulfinyl)acetamido]-3-phenylthiomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₉ H₁₈ N₄ O₅ S₄ : Calculated: C=44.69%, H=3.55%, N=10.97%, S=25.12%; Found: C=44.3%, H=3.4%, N=11.1%, S=24.4%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 57

448 mg. of benzimidazol-2-ylsulfinylacetic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 161 mg. of 7-(benzimidazol-2-ylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₉ H₁₇ N₈ O₅ S₃ : Calculated: C=42.69%, H=3.39%, N=20.96%, S=17.99%; Found: C=42.4%, H=3.8%, N=20.6%, S=17.5%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 58

368 mg. of phenylsulfinylacetic acid and methyl 7-amino-3-azidomethyl-3-cephem-4-carboxylate were reacted in the same manner as described in Example 4 and 503 mg. of methyl 7-(phenylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylate were obtained.

Elementary Analysis Values as C₁₈ H₁₉ N₅ O₅ S₂ : Calculated: C=48.10%, H=4.26%, N=15.58%, S=14.27%; Found: C=47.8%, H=4.2%, N=15.3%, S=13.8%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 59

368 mg. of phenylsulfinylacetic acid and 7-amino-3-methoxymethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 320 mg. of 7-(phenylsulfinylacetamido)-3-methoxymethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₇ H₁₈ N₂ O₆ S₂ : Calculated: C=49.75%, H=4.42%, N=6.82%, S=15.62%; Found: C=50.1%, H=4.8%, N=6.4%, S=15.1%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 60

424 mg. of 2-(4-tolylsulfinyl)propionic acid and methyl 7-amino-deacetoxycephalosporanate were reacted in the same manner as described in Example 4 and 410 mg. of methyl 7-[2-(4-tolylsulfinyl)propionamido]deacetoxycephalosporanate were obtained.

Elementary Analysis Values as C₂₀ H₂₄ N₂ O₅ S₂ : Calculated: C=55.3%, H=5.54%, N=6.42%, S=14.69%; Found: C=54.8%, H=5.4%, N=6.1%, S=13.9%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 61

428 mg. of 2-(p-hydroxyphenylsulfinyl)propionic acid and 7-amino-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 131 mg. of 7-[2-(p-hydroxyphenylsulfinyl)propionamido]-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₁₈ H₁₉ N₃ O₈ S₂ : Calculated: C=46.05%, H=4.08%, N=8.95%, S=13.66%; Found: C=45.5%, H=4.0%, N=8.6%, S=13.1%. The NMR spectrum was found to be in agreement with that of the intended product.

EXAMPLE 62

456 mg. of 2-(p-hydroxyphenylsulfinyl)butyric acid and 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 237 mg. of 7-[2-(p-hydroxyphenylsulfinyl)butyramido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₀ H₂₂ N₆ O₆ S₃ : Calculated: C=44.6%, H=4.12%, N=15.6%, S=17.86%; Found: C=44.5%, H=3.9%, N=16.0%, S=17.4%. The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 63

484 mg. of 3-(p-hydroxyphenylsulfinyl)pentanoic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 555 mg. of 7-[3-(p-hydroxyphenylsulfinyl)pentanamido]-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₂ H₂₄ N₄ O₆ S₄.1/2H₂ O: Calculated: C=45.74%, H=4.36%, N=9.70%, S=22.2%; Found: C=45.5%, H=4.8%, N=9.9%, S=21.8%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 64

540 mg. of 2-methyl-3-(p-hydroxyphenylsulfinyl) pentanoic acid and 7-amino-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 144 mg. of 7-[2-methyl-3-(p-hydroxyphenylsulfinyl)pentanamido]-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₈ H₃₁ N₃ O₈ S₂ : Calculated: C=55.89%, H=5.19%, N=6.98%, S=10.66%; Found: C=55.4%, H=5.5%, N=6.6%, S=10.2%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 65

456 mg. of 3-(p-hydroxyphenylsulfinyl)butyric acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 400 mg. of 7-[3-(p-hydroxyphenylsulfinyl)butyramido]-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₁ H₂₂ N₄ O₆ S₄ : Calculated: C=45.47%, H=4.00%, N=10.10%, S=23.12%; Found: C=45.3%, H=4.1%, N=9.7%, S=22.2%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 66

456 mg. of 2-(p-hydroxybenzylsulfinyl)propionic acid and 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 291 mg. of 7-[2-(p-hydroxybenzylsulfinyl)propionamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₀ H₂₂ N₆ O₆ S₃ : Calculated: C=44.60%, H=4.12%, N=15.60%, S=17.86%; Found: C=44.3%, H=4.5%, N=14.9%, S=17.2%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 67

484 mg. of 3-(p-hydroxybenzylsulfinyl)butyric acid and 7-amino-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 309 mg. of 7-[3-(p-hydroxybenzylsulfinyl)butyramido]-3-carbamoyloxymethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₀ H₂₃ N₃ O₈ S₂.H₂ O: Calculated: C=46.59%, H=4.89%, N=8.15%, S=12.44%; Found: C=46.4%, H=4.9%, N=7.5%, S=11.1%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 68

496 mg. of 2-β-naphthylsulfinyl)propionic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 391 mg. of 7-[2-(β-naphthylsulfinyl)propionamido]-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₄ H₂₂ N₄ O₅ S₄ : Calculated: C=50.16%, H=3.86%, N=9.75%, S=22.32%; Found: C=50.5%, H=3.9%, N=9.4%, S=21.9%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 69

564 mg. of 2-(phenylsulfinyl)nonanoic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 341 mg. of 7-[2-(phenylsulfinyl)nonanamido]-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₆ H₃₂ N₄ O₅ S₄ : Calculated: C=51.29%, H=5.30%, N=9.20%, S=21.07%; Found: C=50.9%, H=5.5%, N=8.5%, S=21.0%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 70

564 mg. of 9-(phenylsulfinyl)nonanoic acid and 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 166 mg. of 7-[3-(phenylsulfinyl)nonanamide]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₅ H₃₂ N₆ O₅ S₃ : Calculated: C=50.66%, H=5.44%, N=14.18%, S=16.23%; Found: C=50.9%, H=5.9%, N=12.8%, S=15.5%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 71

512 mg. of 3-(p-methoxyphenyl)propyl-1-sulfinylacetic acid and 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 246 mg. of 7-[3-(p-methoxyphenyl)propyl-1-sulfinylacetamido]-3-(1methyl-1H-tetrazol-5-ylthiomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₂ H₂₆ N₆ O₆ S₃ : Calculated: C=42.84%, H=4.58%, N=13.63%, S=16.60%; Found: C=43.1%, H=4.4%, N=13.3%, S=16.1%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 72

424 mg. of 3-(p-tolylsulfinyl)propionic acid and 7-amino-deacetoxycephalosporanic acid were reacted in the same manner as described in Example 28 and 392 mg. of 7-[3-(p-tolylsilfinyl)propionamido]-deacetoxycephalosporanic acid were obtained.

Elementary Analysis Values as C₁₈ H₂₀ N₂ O₅ S₂ : Calculated: C=52.93%, H=4.93%, N=6.86%, S=15.70%; Found: C=53.2%, H=4.5%, N=6.5%, S=15.2%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 73

456 mg. of 4-(p-hydroxyphenylsulfinyl)butyric acid and 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 245 mg. of 7-[4-(p-hydroxyphenylsulfinyl)butyramido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₀ H₂₂ N₆ O₆ S₃.H₂ O: Calculated: C=43.16%, H=4.35%, N=15.10%, S=17.28%; Found: C=43.2%, H=4.8%, N=14.8%, S=16.8%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 74

428 mg. of p-hydroxybenzylsulfinylacetic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 592 mg. of 7-(p-hydroxybenzylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₀ H₂₀ N₄ O₆ S₄.H₂ O: Calculated: C=43.00%, H=3.97%, N=10.03%, S=22.96%; Found: C=43.3%, H=3.6%, N=9.8%, S=22.6%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 75

468 mg. of β-naphthylsulfinylacetic acid and 7-amino-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl-3-cephem-4-carboxylic acid were reacted in the same manner as described in Example 28 and 516 mg. of 7-(β-naphthylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid were obtained.

Elementary Analysis Values as C₂₃ H₂₀ N₄ O₅ S₄ : Calculated: C=49.27%, H=3.60%, N=9.99%, S=22.87%; Found: C=48.9%, H=3.5%, N=9.6%, S=22.5%.

The NMR spectra were found to be in agreement with those of the intended product.

EXAMPLE 76

A mixture of diastereomer of cephalosporin obtained according to the method described in Example 19 by using phenylsulfinylacetic acid optically inactive in the sulfoxide instead of phenylsulfinylacetic acid of the R form and 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl-3-cephem-4-carboxylic acid instead of 7-aminocepharosporanic acid was repeatedly recrystallized from a mixed solvent of water and methanol to obtain 7-(phenylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form in the sulfoxide, [α]_(D) ²² of which was 40.1° (C=1.00, in dimethylsulfoxide).

Elementary Analysis Values as C₁₈ H₁₈ N₆ O₅ S₃ : Calculated: C=43.71%, H=3.67%, N=16.99%, S=19.45%; Found: C=43.5%, H=3.9%, N=16.6%, S=19.1%.

EXAMPLE 77

A mixture of diastereomer of cephalosporin obtained according to the method described in Example 20 by using phenylsulfinylacetic acid substantially optically inactive in the sulfoxide instead of that optically active in the sulfoxide was repeatedly recrystallized from a mixed solvent of water and methanol to obtain 7-(phenylsulfinylacetamido)deacetoxycephalosporanic acid of the R form.

EXAMPLE 78

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 19 by using phenylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 20 mg. of 7-(phenylsulfinylacetamido)-cephalosporanic acid of the R form.

EXAMPLE 79

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 28 by using phenylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt, then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 24 mg. of sodium 7-(phenylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylate of the R form.

EXAMPLE 80

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 28 by using phenylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 18 mg. of sodium 7-(phenylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylate of the R form.

EXAMPLE 81

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 28 by using phenylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 25 mg. of sodium 7-(phenylsulfinylacetamido)-3-methoxymethyl-3-cephem-4-carboxylate of the R form.

EXAMPLE 82

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 28 by using 3-(p-hyroxyphenylsulfinyl)propionic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 26 mg. of sodium 7-[3-(p-hydroxyphenylsulfinyl)propionamido]-3-azidomethyl-3-cephem-4-carboxylate of the R form.

EXAMPLE 83

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 33 by using 3-(2-thienylsulfinyl)propionic aicd substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 80 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 26 mg. of sodium 7-[3-(2-thienylsulfinyl)propionamido]-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylate of the R form.

EXAMPLE 84

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 36 by using 4-(2-pyridyl sulfinyl)butyric acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 40 mg. of sodium 7-[4-(2-pyridylsulfinyl)butyramido]-3-ethylthiomethyl-3-cephem-4-carboxylate of the R form.

EXAMPLE 85

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 43 by using 3-thienylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 30 mg. of sodium 7-(3-thienylsulfinylacetamido)-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylate of the R form.

EXAMPLE 86

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 47 by using 2-furylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 26 mg. of sodium 7-(2-furylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylate.

EXAMPLE 87

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 48 by using 2-pyridylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 35 mg. of sodium 7-(2-pyridylsulfinylacetamido)-3-(1-oxopyridazine-3-ylthiomethyl)-3-cephem-4-carboxylate of the R form.

EXAMPLE 88

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 51 by using 1-methyl-1H-tetrazol-5-ylsulfinylacetic acid substantially optically inactive in the sulfoxide was treated according to the method described in Example 3 and converted into a sodium salt. Then 120 mg. of the obtained sodium salt were treated in the same manner as described in Example 2 to obtain 20 mg. of sodium 7-(1-methyl-1H-tetrazol-5-ylsulfinylacetamido)-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylate of the R form.

EXAMPLE 89

228 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 3-(2-thienylsulfinyl) propionic acid instead of 2-thienylsulfinylacetic acid were reacted with 5-mercapto-1H-1,2,3-triazol potassium salt according to the method described in Example 3 to obtain 67 mg. of 7-[3-(2-thienylsulfinyl)propionamido]-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 33.

EXAMPLE 90

211 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 3-(4-pyridylsulfinyl) propionic acid instead of 2-thienylsulfinylacetic acid were reacted with sodium azide according to the method described in Example 3 to obtain 80 mg. of 7-[3-(4-pyridylsulfinyl) propionamido]-3-azidomethyl-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 38.

EXAMPLE 91

228 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 3-(2-methyl-1,2,3-thiadiazol-5-ylsulfinyl)butyric acid instead of 2-thienylsulfinylacetic acid were reacted with sodium azide according to the method described in Example 3 to obtain 79 mg. of 7-[3-(2-methyl-1,3,4-thiadiazol-5-ylsulfinyl)butyramido]-3-azidomethyl-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 39.

EXAMPLE 92

236 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 3-(2-thienylsulfinyl) butyric acid instead of 2-thienylsulfinylacetic acid were reacted with 3-mercapto-1-oxopyridazine according to the method described in Example 3 to obtain 94 mg. of 7-[3-(2-thienylsulfinyl)butyramido]-3-(1-oxopyridazine-3-ylthiomethyl)-3-cephem-4-carboxylic acid.

Elementary Analysis Values as C₂₀ H₂₀ N₄ O₆ S₄ : Calculated: C=44.43%, H=3.73%; Found: C=44.0%, H=4.0%.

EXAMPLE 93

206 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 3-thienylsulfinylacetic acid instead of 2-thienylsulfinylacetic acid were reacted with sodium azide according to the method described in Example 3 to obtain 41 mg. of 7-(3-thienylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 44.

EXAMPLE 94

207 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 2-furylsulfinylacetic acid instead of 2-thienylsulfinylacetic acid were reacted with sodium azide according to the method described in Example 3 to obtain 88 mg. of 7-(2-furylsulfinylacetamido)-3-azido-methyl-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 47.

EXAMPLE 95

224 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 2-pyridylsulfinylacetic acid instead of 2-thienylsulfinylacetic acid were reacted with 3-mercapto-1-oxopyridiazine according to the method described in Example 3 to obtain 70 mg. of 7-(2-pyridylsulfinylacetamido)-3-(1-oxopyridazine-3-ylthiomethyl)-3 cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 48.

EXAMPLE 96

203 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 4-pyridylsulfinylacetic acid instead of 2-thienylsulfinylacetic acid were reacted with sodium azide according to the method described in Example 3 to obtain 42 mg. of 7-(4-pyridylsulfinyl)acetamido-3-azidomethyl-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 49.

EXAMPLE 97

214 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 2-(2-methyl-1,3,4-thiadiazol-5-ylsulfinylacetic acid instead of 2-thienylsulfinylacetic acid were reacted with sodium azide according to the method described in Example 3 to obtain 67 mg. of 7-[2-(2-methyl-1,3,4-thiadiazol-5-ylsulfinyl)acetamido]-3-azidomethyl-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 50.

EXAMPLE 98

230 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 2-(2-methyl-1,3,4-thiadiazol-5-ylsulfinyl)acetic acid instead of 2-thienylsulfinylacetic acid were reacted with thiophenol according to the method described in Example 3 to obtain 76 mg. of 7-[2-(2-methyl-1,3,4-thiadiazol-5-ylsulfinyl)acetamido]-3-phenylthiomethyl-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 56.

EXAMPLE 99

241 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 2-(p-hydroxyphenylsulfinyl) butyric acid instead of 2-thienylsulfinylacetic acid were reacted with 1-methyl-5-mercapto-1H-tetrazole according to the method described in Example 3 to obtain 80 mg. of 7-[2-(p-hydroxyphenylsulfinyl)butyramido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 62.

EXAMPLE 100

248 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 3-(p-hydroxyphenylsulfinyl) pentanoic acid instead of 2-thienylsulfinylacetic acid were reacted with 2-methyl-5-mercapto-1,3,4-thiadiazole according to the method described in Example 3 to obtain 92 mg. of 7-[3-(p-hydroxyphenylsulfinyl)pentanamido]-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 63.

EXAMPLE 101

241 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 3-(p-hydroxyphenylsulfinyl) butyric acid instead of 2-thienylsulfinylacetic acid were reacted with 2-methyl-5-mercapto-1,3,4-thiadiazole according to the method described in Example 3 to obtain 55 mg. of 7-[3-(p-hydroxyphenylsulfinyl)butyramido]-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 65.

EXAMPLE 102

241 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 2-(p-hydroxybenzylsulfinyl) propionic acid instead of 2-thienylsulfinylacetic acid were reacted with 1-methyl-5-mercapto-1H-tetrazole according to the method described in Example 3 to obtain 92 mg. of 7-[2-(p-hydroxybenzylsulfinyl)propionamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 66.

EXAMPLE 103

241 mg. of cephalosporin obtained in the same manner as described in Example 1 by using 4-(p-hydroxyphenylsulfinyl) butyric acid instead of 2-thienylsulfinylacetic acid were reacted with 1-methyl-5-mercapto-1H-tetrazole according to the method described in Example 3 to obtain 76 mg. of 7-[4-(p-hydroxyphenylsulfinyl)butyramido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid. The product was found to be in agreement with that obtained in Example 73.

EXAMPLE 104

234 mg. of cephalosporin obtained in the same manner as described in Example 1 by using p-hydroxybenzylsulfinylacetic acid instead of 2-thienylsulfinylacetic acid were reacted with 2-methyl-5-mercapto-1,3,4-thiadiazole according to the method described in Example 3 to obtain 61 mg. of 7-(p-hydroxybenzylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid of the R form. The product was found to be in agreement with that obtained in Example 74.

EXAMPLE 105

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 1 by using phenylsulfinylacetic acid substantially optically inactive in the sulfoxide instead of that optically active in the sulfoxide was substituted with 1-methyl-5-mercapto-1H-tetrazole according to the method described in Example 3 and was converted to a sodium salt. Then 120 mg. of the sodium salt were treated in the same manners as described in Example 2 to obtain 33 mg. of sodium 7-(phenylsulfinylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl-3-cephem-4-carboxylate of the R form.

EXAMPLE 106

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 1 by using phenulsulfinylacetic acid substantially optically inactive in the sulfoxide instead of that optically active in the sulfoxide was substituted with 2-methyl-5-mercapto-1,3,4-thiadiazole according to the method described in Example 3 and was converted to a sodium salt. Then 120 mg. of the sodium salt were treated in the same manners as described in Example 2 to obtain 30 mg. of sodium 7-(phenylsulfinylacetamido)-3-(2-methyl-1,3,4-thiadiazol-5-ylthiomethyl)-3-cephem-4-carboxylate of the R form.

EXAMPLE 107

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 1 by using 3-(2-thienylsulfinyl)propionic acid substantially optically inactive in the sulfoxide instead of that optically active in the sulfoxide was substituted with 5-mercapto-1H-1,2,3-triazole according to the method described in Example 3 and was converted to a sodium salt. Then 120 mg. of the sodium salt was treated in the same manners as described in Example 2 to obtain 22 mg. of sodium 7-[3-(2-thienylsulfinyl) propionamido]-3-(1H-1,2,3-triazol-5-ylthiomethyl)-3-cephem-4carboxylate of the R form.

EXAMPLE 108

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 1 using 4-(2-pyridylsulfinyl)butyric acid substantially optically inactive in the sulfoxide instead of that optically active in the sulfoxide was substituted with ethanethiol according to the method described in Example 3 and was converted to a sodium salt. Then 120 mg. of the sodium salt were treated in the same manners as described in Example 2 to obtain 35 mg. of sodium 7-[4-(2-pyridylsulfinyl)butyramido]-3-ethylthiomethyl-3-cephem-4-carboxylate of the R form.

EXAMPLE 109

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 1 by using 2-furylsulfinylacetic acid substantially optically inactive in the sulfoxide instead of that optically active in the sulfoxide was substituted with sodium azide according to the method described in Example 3 and was converted to a sodium salt. Then 120 mg. of the sodium salt were treated in the same manners as described in Example 2 to obtain 29 mg. of sodium 7-(2-furylsulfinylacetamido)-3-azidomethyl-3-cephem-4-carboxylate of the R form.

EXAMPLE 110

A mixture of diastereomers of cephalosporin obtained in the same manner as described in Example 1 by using 2-pyridylsulfinylacetic acid substantially optically inactive in the sulfoxide instead of that optically active in the sulfoxide was substituted with 3-mercapto-1-oxopyridazine according to the method described in Example 3 and was converted to a sodium salt. Then 120 mg. of the sodium salt were treated in the same manners as described in Example 2 to obtain 31 mg. of sodium 7-(2-pyridylsulfinylacetamide)-3-(1-oxopyridazine-3-ylthiomethyl)-3-cephem-4-carboxylate of the R form. 

What is claimed is:
 1. 2-thienylsulfinylacetic acid.
 2. 2-thienylsulfinylacetic acid having a positive specific rotation [α]_(D) in ethanol. 